Expansion valve



FIG. 1 is a right front perspective view of an expansion valve;

FIG. 2 is a left rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The ornamental design for expansion valve, as shown and described.